In order to fix the issue, remove the software from your computer using Add or Remove Programs feature (Control Panel > Uninstall a program) or Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, visit Software Informer review page of the product in order to obtain an official link to download the utility, click the green Download button, save the file to your computer and install the program following the on-screen instructions.